产品说明
General Description
The EM78P809N is an 8-bit microprocessor with low-power, high-speed CMOS technology and high noise immunity. It has a built-in 8K x 13-bits Electrical One Time Programmable Read Only Memory (OTP-ROM). It provides multi-protection bits to prevent intrusion of user's OTP memory codes. Seven Option bits are also available to meet user's requirements.
With its OTPROM feature, the EM78P809N is able to offer a convenient way of developing and verifying user's programs. Moreover, user can take advantage of ELAN Writer to easily program his development code.
Features
CPU
Operating voltage: 2.5V ~ 5.5V
Operating temperature range: -40°C ~ 85°C
Operating frequency range (base on 2 clocks)
* Crystal mode: 1MHz ~ 8MHz at 4.5V, 1MHz ~ 4MHz at 2.5V
* RC mode: 1MHz ~ 4MHz at 2.5V
Low power consumption:
* Typically 0.8 μA, during sleep mode
8K x 13 bits on-chip ROM
Multi-security bits to prevent intrusion of OTP memory codes
One configuration register accommodates user's requirements
144 x 8 bits on-chip registers (SRAM, general purpose register)
4 bi-directional I/O ports (22 pins)
* High sink current output pin: 14 pins
* 10 programmable pull high I/O pins
* 10 programmable pull low I/O pins
8 level stacks for subroutine nesting
High performance MCU: Two clocks per instruction cycle
15 interrupts (External: 4, Internal: 11)
Programmable free running watchdog timer
16 bits Counter/Timer
* TC2: Timer/Counter/Window
8 bits Timer/Counter
* TCC: 8-bit real time clock/counter with overflow interrupt
* TC3: Timer/Counter/Capture
* TC4: Timer/Counter/ PWM (pulse width modulation)/PDO (Programmable divider output)
Time Base Timer: (1Hz ~ 16KHz at 8MHz)
Key tone output: (1KHz ~ 8KHz at 8MHz)
Serial transmitter/receiver interface
* Serial Peripheral Interface (SPI): Three-wire synchronous communication
* Universal asynchronous receiver transmitter interface (UART): Two wire asynchronous communication
AD converter
* 8 channel 10 bits resolution AD converter
Operating mode:
* Normal mode: Oscillation circuit turned on, CPU and Peripheral circuit in operation
* Idle mode: Oscillation circuit turned on, CPU halt and Peripheral circuit in operation
* Sleep mode: Oscillation circuit turned off, CPU and Peripheral circuit halt
Package types:
* 28-pin DIP 600mil: EM78P809NP
* 28-pin SOP 300mil: EM78P809NM
* 28-pin SSOP 209mil: EM78P809NS
99.9% single instruction cycle commands
Applications
General purpose
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